Polariton spin Faraday rotation dynamics in a GaAs microcavity

TL;DR

This paper investigates the dynamics of polariton spin Faraday rotation in a GaAs microcavity, providing experimental measurements of spin relaxation times using time-resolved photoluminescence under resonant excitation.

Contribution

It presents the first experimental measurement of polariton spin Faraday rotation dynamics in a GaAs microcavity using a pump-probe technique.

Findings

Measured polariton spin Faraday rotation times.

Demonstrated the use of resonant excitation in time-resolved measurements.

Provided insights into spin relaxation processes in microcavities.

Abstract

Polariton spin carries the combination of the exciton and the photon spin, which is manifested in the circularly polarized emission degree in a III-V quantum wells microcavity system. Relaxation process of such spin system is a complex subject since it involve upper or lower polariton branch, resonant or non resonant polariton excitation process and if the particles are in strong or weak coupling regime. We present here experimental polariton spin Faraday rotation time measurement in GaAs single quantum well microcavity, using time resolved polariton photoluminescence by resonant excitation process in a pump-probe system.